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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $315,097,074 | 3,150,957,466 | 3,150,957,466 |
| 2006 | $347,642,965 | 48,830,921 | 48,830,921 |
| 2007 | $453,054,743 | 53,208,188 | 53,208,188 |
| 2008 | $389,209,832 | 51,264,910 | 51,264,910 |
| 2009 | $365,040,475 | 108,303,868 | 108,303,868 |
| 2010 | $466,184,498 | 112,911,617 | 112,911,617 |
| 2011 | $524,386,718 | 87,793,557 | 87,793,557 |
Note: Quantity represents Weight in kilograms
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